The problem with your font is that you can't see it. Usually you want to use light colored lettering with a shadow or some type of semi-transparent background behind the text. Also if all else fails, use Arial or Helvetica. Also your placement is important. In basic art design, they teach us that the center of attention should be a 1/3 from the edge of the picture. Text over video is often referred to as "lower thirds" which applies to this principle.
Also, I think that your intro is a little bit too long. It would have been OK to show the video clip of the building of the building, a few clips of the people worshipping and then "The Grace Place" with the clouds. Cut it all down to 20 seconds and you will have something nice.
AVOID VIDEO THEFT! Convert over to Betamax!